Question

When we throw a ball upwards, what happens to its speed while it is going
up? Give reason for your answer.
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Answer 1

Explanation:

when we throw ball upwards it speed constantly decrease with the retardation of 9.8 m/s^2.

It is due to the gravity of earth.

Answer 2

it's speed start decreasing and come back to that and this is because of gravitational force of Earth